The Body System Gastrointestinal is identified by letter "B" and occupies the 4th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 4A0B
Measurement of Gastrointestinal Secretion, Via Opening
Measurement of Gastrointestinal Motility, Endo
Measurement of Gastrointestinal Motility, Via Opening
Measurement of Gastrointestinal Pressure, Endo
Measurement of Gastrointestinal Secretion, Endo
Measurement of Gastrointestinal Pressure, Via Opening